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时间:2021-01-31
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1、1、数组的复制:importjava.lang.System;publicclassarraycopy1{publicstaticvoidmain(String[]args){int[]a={1,2,3,4,5,6};int[]b=newint[6];b=a;//通过数组名的赋值for(inti=0;i2、i3、3,56,2,52,89};if(a[0]>a[1]){max=a[0];sec=a[1];}else{max=a[1];sec=a[0];}System.out.print("数组中元素为:"+a[0]+""+a[1]);for(i=2;imax){sec=max;max=a[i];}elseif(a[i]>sec){sec=a[i];}}System.out.println("maxis"+max+"secis"+sec);}}4、3、产生随机数importjava.util.Arrays;publicclasssortarray{publicstaticvoidmain(String[]args){inti,j,temp;int[]a=newint[8];for(i=0;i5、l.Arrays中的sort方法;for(i=0;i6、ystem.out.println("相等");if(str3==str4)System.out.println("相等");elseSystem.out.println("不相等");if(str2==str3)System.out.println("相等");elseSystem.out.println("不相等");System.out.println("equals()方法");if(str1.equals(str2))System.out.println("相等");elseSystem.out.println("不相等");7、if(str3.equals(str4))System.out.println("相等");elseSystem.out.println("不相等");if(str2.equals(str3))System.out.println("相等");elseSystem.out.println("不相等");}}5、字符串2publicclassStringB{publicstaticvoidmain(String[]args){Stringstr1="Hello";Stringstr2="World!";Stringstr=newStrin8、g(str1+str2);System.out.println("str="+str);System.out.println("str的长度是"+str.length());System.out.print
2、i3、3,56,2,52,89};if(a[0]>a[1]){max=a[0];sec=a[1];}else{max=a[1];sec=a[0];}System.out.print("数组中元素为:"+a[0]+""+a[1]);for(i=2;imax){sec=max;max=a[i];}elseif(a[i]>sec){sec=a[i];}}System.out.println("maxis"+max+"secis"+sec);}}4、3、产生随机数importjava.util.Arrays;publicclasssortarray{publicstaticvoidmain(String[]args){inti,j,temp;int[]a=newint[8];for(i=0;i5、l.Arrays中的sort方法;for(i=0;i6、ystem.out.println("相等");if(str3==str4)System.out.println("相等");elseSystem.out.println("不相等");if(str2==str3)System.out.println("相等");elseSystem.out.println("不相等");System.out.println("equals()方法");if(str1.equals(str2))System.out.println("相等");elseSystem.out.println("不相等");7、if(str3.equals(str4))System.out.println("相等");elseSystem.out.println("不相等");if(str2.equals(str3))System.out.println("相等");elseSystem.out.println("不相等");}}5、字符串2publicclassStringB{publicstaticvoidmain(String[]args){Stringstr1="Hello";Stringstr2="World!";Stringstr=newStrin8、g(str1+str2);System.out.println("str="+str);System.out.println("str的长度是"+str.length());System.out.print
3、3,56,2,52,89};if(a[0]>a[1]){max=a[0];sec=a[1];}else{max=a[1];sec=a[0];}System.out.print("数组中元素为:"+a[0]+""+a[1]);for(i=2;imax){sec=max;max=a[i];}elseif(a[i]>sec){sec=a[i];}}System.out.println("maxis"+max+"secis"+sec);}}
4、3、产生随机数importjava.util.Arrays;publicclasssortarray{publicstaticvoidmain(String[]args){inti,j,temp;int[]a=newint[8];for(i=0;i5、l.Arrays中的sort方法;for(i=0;i6、ystem.out.println("相等");if(str3==str4)System.out.println("相等");elseSystem.out.println("不相等");if(str2==str3)System.out.println("相等");elseSystem.out.println("不相等");System.out.println("equals()方法");if(str1.equals(str2))System.out.println("相等");elseSystem.out.println("不相等");7、if(str3.equals(str4))System.out.println("相等");elseSystem.out.println("不相等");if(str2.equals(str3))System.out.println("相等");elseSystem.out.println("不相等");}}5、字符串2publicclassStringB{publicstaticvoidmain(String[]args){Stringstr1="Hello";Stringstr2="World!";Stringstr=newStrin8、g(str1+str2);System.out.println("str="+str);System.out.println("str的长度是"+str.length());System.out.print
5、l.Arrays中的sort方法;for(i=0;i6、ystem.out.println("相等");if(str3==str4)System.out.println("相等");elseSystem.out.println("不相等");if(str2==str3)System.out.println("相等");elseSystem.out.println("不相等");System.out.println("equals()方法");if(str1.equals(str2))System.out.println("相等");elseSystem.out.println("不相等");7、if(str3.equals(str4))System.out.println("相等");elseSystem.out.println("不相等");if(str2.equals(str3))System.out.println("相等");elseSystem.out.println("不相等");}}5、字符串2publicclassStringB{publicstaticvoidmain(String[]args){Stringstr1="Hello";Stringstr2="World!";Stringstr=newStrin8、g(str1+str2);System.out.println("str="+str);System.out.println("str的长度是"+str.length());System.out.print
6、ystem.out.println("相等");if(str3==str4)System.out.println("相等");elseSystem.out.println("不相等");if(str2==str3)System.out.println("相等");elseSystem.out.println("不相等");System.out.println("equals()方法");if(str1.equals(str2))System.out.println("相等");elseSystem.out.println("不相等");
7、if(str3.equals(str4))System.out.println("相等");elseSystem.out.println("不相等");if(str2.equals(str3))System.out.println("相等");elseSystem.out.println("不相等");}}5、字符串2publicclassStringB{publicstaticvoidmain(String[]args){Stringstr1="Hello";Stringstr2="World!";Stringstr=newStrin
8、g(str1+str2);System.out.println("str="+str);System.out.println("str的长度是"+str.length());System.out.print
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