package com.qcby.Test;
public class Test {
public static void main(String[] args) {
int[][] arr1 = {
{1,2},
{2,2},
{3},
{1,1,4}
};
int[][] arr2 = new int[3][2];
arr2[1] = new int[] {3,4,5,6};
String[][] arr3 = {
{"aa","vv"},
{"cc","ww","ff"},
{new String("xxx")},
};
int[][][] arr5 = {
{ {1}, {2,2} },
{ {3,4} , {1} }
};
}
}
package com.qcby.Test;
public class Test {
public static void main(String[] args) {
int[] arr1 = {1,2,3,4};
arr1 = new int[] {2,3,3,1,3};
//基本类型：byte,short,int,long,float,double,char,boolean
int[] arr2 = arr1;
String[] arr3 = {"aa","cc",new String("mmm"),"aaa"};
Person aa = new Person();
Person[] arr4 = {new Person(),new Person(),aa};
}
}
引用传递传的是据点的地址
package com.qcby.Test;
public class Test {
public static void main(String[] args) {
Person x1 = new Person();
Person x2 = new Person();
x1.age = 10;
x2.age = 20;
m1(x1,x2);
}
public static void m1(Person a,Person b) {
Person w1 = a;
a = b;
b = w1;
}
}
package com.qcby.Test;
public class Test {
public static void main(String[] args) {
Person x1 = new Person();
Person x2 = new Person();
x1.age = 10;
x2.age = 20;
m1(x1,x2);
}
public static void m1(Person a,Person b) {
Person w1 = a;
a = b;
b = w1;
}
}
