Is there a way to get a random key and its respective value from a TreeMap?
Question
I want to get a random key and its respective value from a TreeMap. The idea is that a random generator would pick a key and display that value. The key is a string and the value is a double. For example myMap.put("CanSoupWt", 1.0).
Here is the code I've attempted to use. I'm new to Java programming, so my coding is a bit inelegant. What I'm attempting to do is randomly retrieve a key value pair from the Treemap. Then remove the key value pair from the TreeMap and repeat the process with the resulting TreeMap.
package traditional_pantry_sep08_2022;
import java.util.ArrayList;
import java.util.TreeMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
public class Main2 {
public static void main(String[] args) {
// TODO Auto-generated method stub
// select most preferred can food
double v_Can_Soup_Wt = 0.95;
double v_Can_Peas_Wt = 0.95;
double v_Can_Mix_Wt = 0.95;
double v_Can_Meat_Wt = 0.95;
double v_Can_Corn_Wt = 0.95;
double v_Can_Green_Wt = 0.95;
double v_Can_Veggies_Wt = 0.95;
double v_Can_Apple_Wt = 0.95;
double v_Can_Soup_Qty = 0;
double v_Can_Peas_Qty = 0;
double v_Can_Mix_Qty = 0;
double v_Can_Meat_Qty = 0;
double v_Can_Corn_Qty = 0;
double v_Can_Green_Qty = 0;
double v_Can_Veggies_Qty = 0;
double v_Can_Apple_Qty = 0;
double household = 2;
double v_Can_Tot_Wt = 0;
//Set Weight Limit for canned Food based on household size
double v_Can_Tot_MaxWt = 14 + (4 * (household -1));
//Set Max Qty of canned food items based on household size
double v_Can_Soup_MaxQty = 5 + (2 * (household - 1));
double v_Can_Peas_MaxQty = 5 + (2 * (household - 1));
double v_Can_Mix_MaxQty = 5 + (2 * (household - 1));
double v_Can_Meat_MaxQty = 5 + (2 * (household - 1));
double v_Can_Corn_MaxQty = 5 + (2 * (household - 1));
double v_Can_Green_MaxQty = 5 + (2 * (household - 1));
double v_Can_Veggies_MaxQty = 5 + (2 * (household - 1));
double v_Can_Apple_MaxQty = 5 + (2 * (household - 1));
// Select can foods randomly until we reach weight limit
//input canned food weights into TreeMap
TreeMap<String, Double> canall = new TreeMap<String, Double>();
canall.put("CanSoupWt", v_Can_Soup_Wt);
canall.put("CanPeasWt", v_Can_Peas_Wt);
canall.put("CanMixWt", v_Can_Mix_Wt);
canall.put("CanMeatWt", v_Can_Meat_Wt);
canall.put("CanCornWt", v_Can_Corn_Wt);
canall.put("CanGreenWt", v_Can_Green_Wt);
canall.put("CanVeggiesWt", v_Can_Veggies_Wt);
canall.put("CanAppleWt", v_Can_Apple_Wt);
// printing the TreeMap
System.out.println("The TreeMap is : " + canall);
//pick a random canned food item from the TreeMap
//Object[] crunchifyKeys = canall.keySet().toArray();
do {
Object[] crunchifyKeys = canall.keySet().toArray();
Object key = crunchifyKeys[new Random().nextInt(crunchifyKeys.length)];
System.out.println("************ Random Value ************ \n" + key + " :: " + canall.get(key));
List<Map.Entry<String, Double>> list = new ArrayList<Map.Entry<String, Double>>(canall.entrySet());
System.out.println("The TreeMap is : " + canall);
//pick maximum number of canned food items
if (key == "CanSoupWt") {
do {
v_Can_Soup_Qty++;
v_Can_Tot_Wt = v_Can_Tot_Wt + (v_Can_Soup_Wt * v_Can_Soup_Qty);
}
while (v_Can_Soup_Qty < v_Can_Soup_MaxQty /*&& v_Can_Tot_Wt < v_Can_Tot_MaxWt*/);
if (v_Can_Tot_Wt > v_Can_Tot_MaxWt) {
v_Can_Soup_Qty--;
}
canall.remove("CanSoupWt"); //remove selected item
}
else if (key == "CanPeasWt") {
do {
v_Can_Peas_Qty++;
v_Can_Tot_Wt = v_Can_Tot_Wt + (v_Can_Peas_Wt * v_Can_Peas_Qty);
}
while (v_Can_Peas_Qty < v_Can_Peas_MaxQty /*&& v_Can_Tot_Wt < v_Can_Tot_MaxWt*/);
if (v_Can_Tot_Wt > v_Can_Tot_MaxWt) {
v_Can_Peas_Qty--;
}
canall.remove("CanPeasWt"); //remove selected item
}
else if (key == "CanMixWt") {
do {
v_Can_Mix_Qty++;
v_Can_Tot_Wt = v_Can_Tot_Wt + (v_Can_Mix_Wt * v_Can_Mix_Qty);
}
while (v_Can_Mix_Qty < v_Can_Mix_MaxQty /*&& v_Can_Tot_Wt < v_Can_Tot_MaxWt*/);
if (v_Can_Tot_Wt > v_Can_Tot_MaxWt) {
v_Can_Mix_Qty--;
}
canall.remove("CanMixWt"); //remove selected item
}
else if (key == "CanMeatWt") {
do {
v_Can_Meat_Qty++;
v_Can_Tot_Wt = v_Can_Tot_Wt + (v_Can_Meat_Wt * v_Can_Meat_Qty);
}
while ( v_Can_Meat_Wt < v_Can_Meat_MaxQty /*&& v_Can_Tot_Wt < v_Can_Tot_MaxWt*/);
if (v_Can_Tot_Wt > v_Can_Tot_MaxWt) {
v_Can_Meat_Qty--;
}
canall.remove("CanMeatWt"); //remove selected item
}
else if (key == "CanCornWt") {
do {
v_Can_Corn_Qty++;
v_Can_Tot_Wt = v_Can_Tot_Wt + (v_Can_Corn_Wt * v_Can_Corn_Qty);
}
while (v_Can_Corn_Wt < v_Can_Corn_MaxQty /*&& v_Can_Tot_Wt < v_Can_Tot_MaxWt*/);
if (v_Can_Tot_Wt > v_Can_Tot_MaxWt) {
v_Can_Corn_Qty--;
}
canall.remove("CanCornWt"); //remove selected item
}
else if (key == "CanGreenWt") {
do {
v_Can_Green_Qty++;
v_Can_Tot_Wt = v_Can_Tot_Wt + (v_Can_Green_Wt * v_Can_Green_Qty);
}
while (v_Can_Green_Wt < v_Can_Green_MaxQty /*&& v_Can_Tot_Wt < v_Can_Tot_MaxWt*/);
if (v_Can_Tot_Wt > v_Can_Tot_MaxWt) {
v_Can_Green_Qty--;
}
canall.remove("CanGreenWt"); //remove selected item
}
else if (key == "CanVeggiesWt") {
do {
v_Can_Veggies_Qty++;
v_Can_Tot_Wt = v_Can_Tot_Wt + (v_Can_Veggies_Wt * v_Can_Veggies_Qty);
}
while (v_Can_Veggies_Wt < v_Can_Veggies_MaxQty /*&& v_Can_Tot_Wt < v_Can_Tot_MaxWt*/);
if (v_Can_Tot_Wt > v_Can_Tot_MaxWt) {
v_Can_Veggies_Qty--;
}
canall.remove("CanVeggiesWt"); //remove selected item
}
else if (key == "CanAppleWt") {
do {
v_Can_Apple_Qty++;
v_Can_Tot_Wt = v_Can_Tot_Wt + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
while (v_Can_Apple_Wt < v_Can_Apple_MaxQty /*&& v_Can_Tot_Wt < v_Can_Tot_MaxWt*/);
if (v_Can_Tot_Wt > v_Can_Tot_MaxWt) {
v_Can_Apple_Qty--;
}
canall.remove("CanAppleWt"); //remove selected item
}
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty)
+ (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty)
+ (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
while (v_Can_Tot_Wt < v_Can_Tot_MaxWt);
System.out.println("Household Members: " +household);
System.out.println("Can Soup Qty: " +v_Can_Soup_Qty);
System.out.println("Can Peas Qty: " +v_Can_Peas_Qty);
System.out.println("Can Mix Beans Qty: " +v_Can_Mix_Qty);
System.out.println("Can Meat Qty: " +v_Can_Meat_Qty);
System.out.println("Can Corn Qty: " +v_Can_Corn_Qty);
System.out.println("Can Green Qty: " +v_Can_Green_Qty);
System.out.println("Can Veggies Qty: " +v_Can_Veggies_Qty);
System.out.println("Can Apple Qty: " +v_Can_Apple_Qty);
System.out.println("Can Food Total Weight: " +v_Can_Tot_Wt);
System.out.println("Can Food Maximum Weight: " +v_Can_Tot_MaxWt);
// printing the TreeMap
System.out.println("The TreeMap is : " + canall);
}
}
2 answers
solution1
0 2022-09-13 23:42:04
This isn't the most efficient code. But it seems to work.
package traditional_pantry_sep08_2022;
import java.util.ArrayList;
import java.util.TreeMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
public class Main {
public static void main(String[] args) {
// select most preferred can food
double v_Can_Soup_Wt = 0.95;
double v_Can_Peas_Wt = 0.95;
double v_Can_Mix_Wt = 0.95;
double v_Can_Meat_Wt = 0.95;
double v_Can_Corn_Wt = 0.95;
double v_Can_Green_Wt = 0.95;
double v_Can_Veggies_Wt = 0.95;
double v_Can_Apple_Wt = 0.95;
double v_Can_Soup_Qty = 0;
double v_Can_Peas_Qty = 0;
double v_Can_Mix_Qty = 0;
double v_Can_Meat_Qty = 0;
double v_Can_Corn_Qty = 0;
double v_Can_Green_Qty = 0;
double v_Can_Veggies_Qty = 0;
double v_Can_Apple_Qty = 0;
double household = 2;
double v_Can_Tot_Wt = 0;
//Set Weight Limit for canned Food based on household size
double v_Can_Tot_MaxWt = 14 + (4 * (household -1));
//Set Max Qty of canned food items based on household size
double v_Can_Soup_MaxQty = 5 + (2 * (household - 1));
double v_Can_Peas_MaxQty = 5 + (2 * (household - 1));
double v_Can_Mix_MaxQty = 5 + (2 * (household - 1));
double v_Can_Meat_MaxQty = 5 + (2 * (household - 1));
double v_Can_Corn_MaxQty = 5 + (2 * (household - 1));
double v_Can_Green_MaxQty = 5 + (2 * (household - 1));
double v_Can_Veggies_MaxQty = 5 + (2 * (household - 1));
double v_Can_Apple_MaxQty = 5 + (2 * (household - 1));
// Select can foods randomly until we reach weight limit
//input canned food weights into TreeMap
TreeMap<String, Double> canall = new TreeMap<String, Double>();
canall.put("CanSoupWt", v_Can_Soup_Wt);
canall.put("CanPeasWt", v_Can_Peas_Wt);
canall.put("CanMixWt", v_Can_Mix_Wt);
canall.put("CanMeatWt", v_Can_Meat_Wt);
canall.put("CanCornWt", v_Can_Corn_Wt);
canall.put("CanGreenWt", v_Can_Green_Wt);
canall.put("CanVeggiesWt", v_Can_Veggies_Wt);
canall.put("CanAppleWt", v_Can_Apple_Wt);
// printing the TreeMap
System.out.println("The TreeMap is : " + canall);
//pick a random canned food item from the TreeMap
//Object[] crunchifyKeys = canall.keySet().toArray();
do {
Object[] crunchifyKeys = canall.keySet().toArray();
Object key = crunchifyKeys[new Random().nextInt(crunchifyKeys.length)];
System.out.println("************ Random Value ************ \n" + key + " :: " + canall.get(key));
List<Map.Entry<String, Double>> list = new ArrayList<Map.Entry<String, Double>>(canall.entrySet());
System.out.println("The TreeMap is : " + canall);
//pick maximum number of canned food items
if (key == "CanSoupWt") {
do {
v_Can_Soup_Qty++;
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty)
+ (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty)
+ (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
while (v_Can_Soup_Qty < v_Can_Soup_MaxQty /*&& v_Can_Tot_Wt < v_Can_Tot_MaxWt*/);
if (v_Can_Tot_Wt > v_Can_Tot_MaxWt) {
v_Can_Soup_Qty--;
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty)
+ (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty)
+ (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
canall.remove("CanSoupWt"); //remove selected item
}
else if (key == "CanPeasWt") {
do {
v_Can_Peas_Qty++;
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty)
+ (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty)
+ (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
while (v_Can_Peas_Qty < v_Can_Peas_MaxQty /*&& v_Can_Tot_Wt < v_Can_Tot_MaxWt*/);
if (v_Can_Tot_Wt > v_Can_Tot_MaxWt) {
v_Can_Peas_Qty--;
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty)
+ (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty)
+ (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
canall.remove("CanPeasWt"); //remove selected item
}
else if (key == "CanMixWt") {
do {
v_Can_Mix_Qty++;
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty) + (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty) + (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
while (v_Can_Mix_Qty < v_Can_Mix_MaxQty /*&& v_Can_Tot_Wt < v_Can_Tot_MaxWt*/);
if (v_Can_Tot_Wt > v_Can_Tot_MaxWt) {
v_Can_Mix_Qty--;
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty) + (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty) + (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
canall.remove("CanMixWt"); //remove selected item
}
else if (key == "CanMeatWt") {
do {
v_Can_Meat_Qty++;
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty) + (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty) + (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
while ( v_Can_Meat_Wt < v_Can_Meat_MaxQty /*&& v_Can_Tot_Wt < v_Can_Tot_MaxWt*/);
if (v_Can_Tot_Wt > v_Can_Tot_MaxWt) {
v_Can_Meat_Qty--;
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty) + (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty) + (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
canall.remove("CanMeatWt"); //remove selected item
}
else if (key == "CanCornWt") {
do {
v_Can_Corn_Qty++;
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty) + (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty) + (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
while (v_Can_Corn_Wt < v_Can_Corn_MaxQty /*&& v_Can_Tot_Wt < v_Can_Tot_MaxWt*/);
if (v_Can_Tot_Wt > v_Can_Tot_MaxWt) {
v_Can_Corn_Qty--;
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty) + (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty) + (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
canall.remove("CanCornWt"); //remove selected item
}
else if (key == "CanGreenWt") {
do {
v_Can_Green_Qty++;
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty) + (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty) + (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
while (v_Can_Green_Wt < v_Can_Green_MaxQty /*&& v_Can_Tot_Wt < v_Can_Tot_MaxWt*/);
if (v_Can_Tot_Wt > v_Can_Tot_MaxWt) {
v_Can_Green_Qty--;
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty) + (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty) + (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
canall.remove("CanGreenWt"); //remove selected item
}
else if (key == "CanVeggiesWt") {
do {
v_Can_Veggies_Qty++;
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty) + (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty) + (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
while (v_Can_Veggies_Wt < v_Can_Veggies_MaxQty /*&& v_Can_Tot_Wt < v_Can_Tot_MaxWt*/);
if (v_Can_Tot_Wt > v_Can_Tot_MaxWt) {
v_Can_Veggies_Qty--;
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty) + (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty) + (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
canall.remove("CanVeggiesWt"); //remove selected item
}
else if (key == "CanAppleWt") {
do {
v_Can_Apple_Qty++;
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty) + (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty) + (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
while (v_Can_Apple_Wt < v_Can_Apple_MaxQty /*&& v_Can_Tot_Wt < v_Can_Tot_MaxWt*/);
if (v_Can_Tot_Wt > v_Can_Tot_MaxWt) {
v_Can_Apple_Qty--;
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty) + (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty) + (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
canall.remove("CanAppleWt"); //remove selected item
/*v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty)
+ (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty)
+ (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);*/
}
v_Can_Tot_Wt = (v_Can_Soup_Wt * v_Can_Soup_Qty) + (v_Can_Peas_Wt * v_Can_Peas_Qty)
+ (v_Can_Mix_Wt * v_Can_Mix_Qty) + (v_Can_Meat_Wt * v_Can_Meat_Qty)
+ (v_Can_Corn_Wt * v_Can_Corn_Qty)+ (v_Can_Green_Wt * v_Can_Green_Qty)
+ (v_Can_Veggies_Wt * v_Can_Veggies_Qty) + (v_Can_Apple_Wt * v_Can_Apple_Qty);
}
while (v_Can_Tot_Wt < v_Can_Tot_MaxWt);
System.out.println("Household Members: " +household);
System.out.println("Can Soup Qty: " +v_Can_Soup_Qty);
System.out.println("Can Peas Qty: " +v_Can_Peas_Qty);
System.out.println("Can Mix Beans Qty: " +v_Can_Mix_Qty);
System.out.println("Can Meat Qty: " +v_Can_Meat_Qty);
System.out.println("Can Corn Qty: " +v_Can_Corn_Qty);
System.out.println("Can Green Qty: " +v_Can_Green_Qty);
System.out.println("Can Veggies Qty: " +v_Can_Veggies_Qty);
System.out.println("Can Apple Qty: " +v_Can_Apple_Qty);
System.out.println("Can Food Total Weight: " +v_Can_Tot_Wt);
System.out.println("Can Food Maximum Weight: " +v_Can_Tot_MaxWt);
// printing the TreeMap
System.out.println("The TreeMap is : " + canall);
}
}
solution2
0 2022-09-14 01:31:48
NavigableMap#navigableKeySet
I want to get a random key and its respective value from a TreeMap
For any NavigableMap such as TreeMap , you can get a set of keys that iterate in the map's defined order.
NavigableMap < String , Double > map = new TreeMap<>() ;
…
NavigableSet < String > keysSet = map.navigableKeySet() ;
From there we can get an unmodifiable list.
List < String > keys = List.copyOf( keysSet ) ;
Finally, we can access elements of the list randomly by generating an index number. Remember that index numbers are zero-based counting.
int index = ThreadLocalRandom.current().nextInt( keys.size() ) ;
String k = keys.get( index ) ;
And retrieve the associated value from the map.
Double v = map.get( k ) ;
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